When I "zapped" the AN8002, it was the higher energy generator that caused the damage you mention. I don't record any of this testing in the spreadsheet. It's more an FYI than anything.
Yes. The meter had already failed (one of the clamp transistors exploded), you were unsatisfied with that result and felt the need for some fireworks so you turned up the power and switched it to an amps range. We all have days like that, it's nothing to be ashamed of.
Where are you sending the $10 if the 8008 fails the gun?
To any person who sends me $10 if it doesn't.
Meter was damaged at the 3KV but the DCV function still worked. I took the meter apart to see if it was a simple repair. At that point the clamp was still fine. The breakdown appeared to be in the selector switch. The board does not have a lot on it and some of the functions were not showing the proper mode. Conclusion, dead controller IC.
If I could have repaired it, I would have stopped the testing and used it for another reference meter. This is what happens with most of the repairable ones, or in the case of Dave's pre-production 121GW or the UNI-T 181A, I attempt to determine why they were damaged and see if they could be hardened. Then I run them again. In the case of the 121GW, it was damaged a second time but I got lucky and was able to repair it a second time and added one more TVS. I then tested it again and it survived at the 6 and change KV level where I stopped testing.
I ended up putting the meter back together and turned the generator up to max. This damages it to where it no longer powers up.
As I have previously explained, the 1/2 cycle simulator requires the low energy generator to work. So the criteria is the meter is non-repairable and will break over at less than 5KV. I applied one more transient with the lower energy generator to make sure it would break down in the volts mode. I then gave it one transient off the 1/2 cycle in volts mode. I switched the meter to mA and gave it one more cycle. Then I took the meter back apart. This is where you first see the extensive damage.
I then give it one more transient with the cover off using the 1/2 cycle generator.
I don't think I ever tried the Amps side. I still have the meter sitting in the scrap box to recycle but I stole the shunt out of it when I ran all of them.